Update:
Motion X Drive HD will mirror the Nav screen to a 2nd Monitor with the proper composite video cable. If you have the right cable it works great. In fact the iPhone or iPad can be used as a controller for the second screen. If you have a RV with a monitor your passenger can go into the mail menue of the app and look for points of interest or search or do any function from the iPhone or iPad and the mirrored Navigation screen always stays up on the screen. Very cool stuff. The only thing that would make this better is if you could run the app in the background if a call comes in. The downfall is the app always has to be up and running on the phone to mirror to the 2nd monitor. So if you want to talk on the phone you will lose the screen. You can pinch to zoom and it mirrors your movement. RVers try it if your monitor has a AV Input, you will love it.